Cite

The rival doctors -- or pills & potions / [graphic]

MLA

Gunthorpe, 19th century, printmaker. The rival doctors -- or pills & potions / [graphic]. [19th century]. https://collections.library.yale.edu/catalog/17339283.

APA, 6th edition

Gunthorpe, 19th century, printmaker. ([19th century])[The rival doctors -- or pills & potions / [graphic]]. https://collections.library.yale.edu/catalog/17339283.